describe('zoomAnimation', function () {
    /////////////////////////////
    // SETUP FOR EACH TEST
    /////////////////////////////
    var div, map, group, clock, realBrowser;

    beforeEach(function () {
        realBrowser = L.Browser;
        clock = sinon.useFakeTimers();

        div = document.createElement('div');
        div.style.width = '200px';
        div.style.height = '200px';
        document.body.appendChild(div);

        map = L.map(div, {maxZoom: 18, trackResize: false});

        // Corresponds to zoom level 8 for the above div dimensions.
        map.fitBounds(new L.LatLngBounds([
            [1, 1],
            [2, 2]
        ]));
    });

    afterEach(function () {
        if (group instanceof L.MarkerClusterGroup) {
            group.clearLayers();
            map.removeLayer(group);
        }

        map.remove();
        document.body.removeChild(div);
        clock.restore();

        div = map = group = clock = null;
    });

    function setBrowserToMobile() {
        var fakeBrowser = {};
        for (k in realBrowser) {
            fakeBrowser[k] = realBrowser[k];
        }
        fakeBrowser.mobile = true;
        L.Browser = fakeBrowser;
    }

    /////////////////////////////
    // TESTS
    /////////////////////////////
    it('adds the visible marker to the map when zooming in', function () {
        map.setView(new L.LatLng(-37.36142550190516, 174.254150390625), 7);

        group = new L.MarkerClusterGroup({
            showCoverageOnHover: true,
            maxClusterRadius: 20,
            disableClusteringAtZoom: 15
        });
        var marker = new L.Marker([-37.77852090603777, 175.3103667497635]);
        group.addLayer(marker); //The one we zoom in on
        group.addLayer(new L.Marker([-37.711800591811055, 174.50034790039062])); //Marker that we cluster with at the top zoom level, but not 1 level down
        map.addLayer(group);

        clock.tick(1000);
        map.setView([-37.77852090603777, 175.3103667497635], 15);

        //Run the the animation
        clock.tick(1000);

        expect(marker._icon).to.not.be(undefined);
        expect(marker._icon).to.not.be(null);
    });

    it('adds the visible marker to the map when jumping around', function () {

        group = new L.MarkerClusterGroup();
        var marker1 = new L.Marker([48.858280181884766, 2.2945759296417236]);
        var marker2 = new L.Marker([16.02359962463379, -61.70280075073242]);
        group.addLayer(marker1); //The one we zoom in on first
        group.addLayer(marker2); //Marker that we cluster with at the top zoom level, but not 1 level down
        map.addLayer(group);

        //show the first
        map.fitBounds(new L.LatLngBounds(new L.LatLng(41.371582, -5.142222), new L.LatLng(51.092804, 9.561556)));

        clock.tick(1000);

        map.fitBounds(new L.LatLngBounds(new L.LatLng(15.830972671508789, -61.807167053222656), new L.LatLng(16.516849517822266, -61.0)));

        //Run the the animation
        clock.tick(1000);

        //Now the second one should be visible on the map
        expect(marker2._icon).to.not.be(undefined);
        expect(marker2._icon).to.not.be(null);
    });

    it('adds the visible markers to the map, but not parent clusters when jumping around', function () {

        group = new L.MarkerClusterGroup();

        var marker1 = new L.Marker([59.9520, 30.3307]),
            marker2 = new L.Marker([59.9516, 30.3308]),
            marker3 = new L.Marker([59.9513, 30.3312]);

        group.addLayer(marker1);
        group.addLayer(marker2);
        group.addLayer(marker3);
        map.addLayer(group);

        //Show none of them
        map.setView([53.0676, 170.6835], 16);

        clock.tick(1000);

        //Zoom so that all the markers will be visible (Same as zoomToShowLayer)
        map.setView(marker1.getLatLng(), 18);

        //Run the the animation
        clock.tick(1000);

        //Now the markers should all be visible, and there should be no visible clusters
        expect(marker1._icon.parentNode).to.be(map._panes.markerPane);
        expect(marker2._icon.parentNode).to.be(map._panes.markerPane);
        expect(marker3._icon.parentNode).to.be(map._panes.markerPane);
        expect(map._panes.markerPane.childNodes.length).to.be(3);
    });

    it('removes clicked clusters on the edge of a mobile screen', function () {
        setBrowserToMobile();

        try {
            // Corresponds to zoom level 8 for the above div dimensions.
            map.fitBounds(new L.LatLngBounds([
                [1, 1],
                [2, 2]
            ]));

            group = new L.MarkerClusterGroup({
                maxClusterRadius: 80
            }).addTo(map);

            // Add a marker 1 pixel below the initial screen bottom edge.
            var bottomPoint = map.getPixelBounds().max.add([0, 1]),
                bottomLatLng = map.unproject(bottomPoint),
                centerLng = map.getCenter().lng,
                bottomPosition = new L.LatLng(
                    bottomLatLng.lat,
                    centerLng
                ),
                bottomMarker = new L.Marker(bottomPosition).addTo(group),
                initialZoom = map.getZoom();

            expect(bottomMarker._icon).to.be(undefined);

            // Add many markers 79 pixels above the first one, so they cluster with it.
            var newPoint = bottomPoint.add([0, -79]),
                newLatLng = L.latLng(
                    map.unproject(newPoint).lat,
                    centerLng
                );

            for (var i = 0; i < 10; i += 1) {
                group.addLayer(new L.Marker(newLatLng));
            }

            var parentCluster = bottomMarker.__parent;

            expect(parentCluster._icon.parentNode).to.be(map._panes.markerPane);

            parentCluster.fireEvent('click', null, true);

            //Run the the animation
            clock.tick(1000);

            expect(map.getZoom()).to.equal(initialZoom + 1); // The fitBounds with 200px height should result in zooming 1 level in.

            // Finally make sure that the cluster has been removed from map.
            expect(parentCluster._icon).to.be(null);
            expect(map._panes.markerPane.childNodes.length).to.be(2); // The bottomMarker + cluster for the 10 above markers.
        } finally {
            L.Browser = realBrowser;
        }
    });

    describe('zoomToShowLayer', function () {

        it('zoom to single marker inside map view', function () {
            group = new L.MarkerClusterGroup();

            var marker = new L.Marker([59.9520, 30.3307]);

            group.addLayer(marker);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            map.setView(marker.getLatLng(), 10);

            clock.tick(1000);

            var initialCenter = map.getCenter();
            var initialZoom = map.getZoom();

            group.zoomToShowLayer(marker, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Marker should be visible, map center and zoom level should stay the same, callback called once
            expect(marker._icon).to.not.be(undefined);
            expect(marker._icon).to.not.be(null);
            expect(map.getBounds().contains(marker.getLatLng())).to.be.true;
            expect(map.getCenter()).to.eql(initialCenter);
            expect(map.getZoom()).to.equal(initialZoom);
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('pan map to single marker outside map view', function () {
            group = new L.MarkerClusterGroup();

            var marker = new L.Marker([59.9520, 30.3307]);

            group.addLayer(marker);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            //Show none of them
            map.setView([53.0676, 170.6835], 16);

            clock.tick(1000);

            var initialZoom = map.getZoom();

            group.zoomToShowLayer(marker, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Marker should be visible, map center should be equal to marker center,
            //zoom level should stay the same, callback called once
            expect(marker._icon).to.not.be(undefined);
            expect(marker._icon).to.not.be(null);
            expect(map.getBounds().contains(marker.getLatLng())).to.be.true;
            expect(map.getCenter()).to.eql(marker.getLatLng());
            expect(map.getZoom()).to.equal(initialZoom);
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('change view and zoom to marker in cluster inside map view', function () {
            group = new L.MarkerClusterGroup();

            var marker1 = new L.Marker([59.9520, 30.3307]);
            var marker2 = new L.Marker([59.9516, 30.3308]);
            var marker3 = new L.Marker([59.9513, 30.3312]);

            group.addLayer(marker1);
            group.addLayer(marker2);
            group.addLayer(marker3);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            map.setView(marker1.getLatLng(), 16);

            clock.tick(1000);

            group.zoomToShowLayer(marker1, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Now the markers should all be visible, there should be no visible clusters, and callback called once
            expect(marker1._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker2._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker3._icon.parentNode).to.be(map._panes.markerPane);
            expect(map._panes.markerPane.childNodes.length).to.be(3);
            expect(map.getBounds().contains(marker1.getLatLng())).to.be.true;
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('change view and zoom to marker in cluster outside map view', function () {
            group = new L.MarkerClusterGroup();

            var marker1 = new L.Marker([59.9520, 30.3307]);
            var marker2 = new L.Marker([59.9516, 30.3308]);
            var marker3 = new L.Marker([59.9513, 30.3312]);

            group.addLayer(marker1);
            group.addLayer(marker2);
            group.addLayer(marker3);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            //Show none of them
            map.setView([53.0676, 170.6835], 16);

            clock.tick(1000);

            group.zoomToShowLayer(marker1, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Now the markers should all be visible, there should be no visible clusters, and callback called once
            expect(marker1._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker2._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker3._icon.parentNode).to.be(map._panes.markerPane);
            expect(map._panes.markerPane.childNodes.length).to.be(3);
            expect(map.getBounds().contains(marker1.getLatLng())).to.be.true;
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('spiderfy overlapping markers', function () {
            group = new L.MarkerClusterGroup();

            var marker1 = new L.Marker([59.9520, 30.3307]);
            var marker2 = new L.Marker([59.9520, 30.3307]);
            var marker3 = new L.Marker([59.9520, 30.3307]);

            group.addLayer(marker1);
            group.addLayer(marker2);
            group.addLayer(marker3);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            //Show none of them
            map.setView([53.0676, 170.6835], 16);

            clock.tick(1000);

            group.zoomToShowLayer(marker1, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Now the markers should all be visible, parent cluster should be spiderfied, and callback called once
            expect(marker1._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker2._icon.parentNode).to.be(map._panes.markerPane);
            expect(marker3._icon.parentNode).to.be(map._panes.markerPane);
            expect(map._panes.markerPane.childNodes.length).to.be(4);//3 markers + spiderfied parent cluster
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('zoom or spiderfy markers if they visible on next level of zoom', function () {
            group = new L.MarkerClusterGroup();

            var marker1 = new L.Marker([59.9520, 30.3307]);
            var marker2 = new L.Marker([59.9516, 30.3308]);
            var marker3 = new L.Marker([59.9513, 30.3312]);

            group.addLayer(marker1);
            group.addLayer(marker2);
            group.addLayer(marker3);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            //Markers will be visible on zoom 18
            map.setView([59.9520, 30.3307], 17);

            clock.tick(1000);

            group.zoomToShowLayer(marker1, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Now the markers should all be visible (zoomed or spiderfied), and callback called once
            expect(marker1._icon).to.not.be(undefined);
            expect(marker1._icon).to.not.be(null);
            expect(marker2._icon).to.not.be(undefined);
            expect(marker2._icon).to.not.be(null);
            expect(marker3._icon).to.not.be(undefined);
            expect(marker3._icon).to.not.be(null);
            sinon.assert.calledOnce(zoomCallbackSpy);
        });

        it('zoom and executes callback even for non-icon-based Marker', function () {
            group = new L.MarkerClusterGroup();

            var marker1 = new L.CircleMarker([59.9520, 30.3307]);
            var marker2 = new L.CircleMarker([59.9516, 30.3308]);
            var marker3 = new L.CircleMarker([59.9513, 30.3312]);

            group.addLayer(marker1);
            group.addLayer(marker2);
            group.addLayer(marker3);
            map.addLayer(group);

            var zoomCallbackSpy = sinon.spy();

            //Markers will be visible on zoom 18
            map.setView([59.9520, 30.3307], 16);

            clock.tick(1000);

            expect(map.hasLayer(marker1)).to.be(false);
            expect(map.hasLayer(marker2)).to.be(false);
            expect(map.hasLayer(marker3)).to.be(false);

            group.zoomToShowLayer(marker1, zoomCallbackSpy);

            //Run the the animation
            clock.tick(1000);

            //Now the markers should all be visible (zoomed or spiderfied), and callback called once
            expect(map.hasLayer(marker1)).to.be(true);
            expect(map.hasLayer(marker2)).to.be(true);
            expect(map.hasLayer(marker3)).to.be(true);
            sinon.assert.calledOnce(zoomCallbackSpy);
        });
    });
});
